Hyperolius castaneus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~70% in a week >90%
Hyperolius castaneus is a species of frogs in the family Hyperoliidae. It is found in the highlands of western Burundi, Rwanda, and Uganda as well as eastern Democratic Republic of the Congo. Common names of this species include Ahl's reed frog, brown reed frog, and montane reed frog. The status of the putative subspecies Hyperolius castaneus rhodogaster is unclear, and it may actually be a distinct species. Also Hyperolius constellatus, now a distinct species, was formerly recognized as a subspecies of H. castaneus.
Adult males measure 20–26 mm (0.79–1.02 in) and adult females 27–32 mm (1.1–1.3 in) in snout–vent length. The color pattern is highly variable. The dorsum in adult males is consistently tan to brown. There are varying levels of yellow or brown spots, or yellow blotches that may cover most of the dorsum. The yellow spots might have dark brown centers or edging. Most specimens have a brown or dark brown canthal stripe that runs from the nostril through the eye to at least the forelimb insertion, sometimes further to the inguinal region of the hind limb. The throat is canary yellow. The belly is grayish blue or white. The limbs are salmon red to red, with... Wikipedia →
Recording0:05
Rwanda · 2006
© probreviceps · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nyungwe National Park | 🇷🇼 Rwanda |
More parks will be added in future updates.
Likely
About 40% of wildlife watchers report a Brown Reed Frog sighting in Nyungwe National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 70%, and over a week to over 90%, if each day is a fresh chance.
March
In that month about 60% of wildlife watchers report a Brown Reed Frog in Nyungwe National Park on a given day, against about 10% in January–February, May–June and September–November, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Brown Reed Frog sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Nyungwe National Park, in our data
Nyungwe National Park is the only park on Wallace's Line with enough records to rate Brown Reed Frog sightings: about 40% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Brown Reed Frog is recorded against all the amphibians logged in Nyungwe National Park (9 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
